Hi everyone,
Ansys workbench has its Aqwa module to do hydrodynamic analyses of structures. Mine is an offshore structure with a moonpool and I already determined the RAOs (Response Amplitude Operators) of the structure in different wave conditions. What I need is the RAO of wave elevation (free surface elevation) of water inside the moonpool.
Does anybody in the forum know how to calculate it using Ansys Aqwa?
If you have the moonpool modelled as an open area, you can calculate the RAO's inside the moonpool like you do for the free surface. If you have done the calculations with an closed moonpool you are stuck. Most likely your moonpool relative motions will not be very good due to resonant waves inside. The best is to use a free surface lid inside the moonpool and dampen the waves somewhat. Model tests should be used for benchmarking and damping factor calibration. Success.
If you have the moonpool modelled as an open area, you can calculate the RAO's inside the moonpool like you do for the free surface. If you have done the calculations with an closed moonpool you are stuck. Most likely your moonpool relative motions will not be very good due to resonant waves inside. The best is to use a free surface lid inside the moonpool and dampen the waves somewhat. Model tests should be used for benchmarking and damping factor calibration. Success.
Hello Sir,
Thank you very much for the reply. I have modeled it as an open area (PFA).
I would like to have the RAO of wave elevation at a point inside the moonpool and like to plot it against wave frequency.
How can I do that in ANSYS AQWA?
Please let me know.
Regards.
The output of wave velocities is organized by AQWA-FLOW. We have used this for external points, but not for internal points. But I guess that will work equally well. Otherwise, AQWA has a good help desk to support you.
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